| 摘要 |
A carton feed opening wheel assembly for opening carton blanks into preformed cartons on a packaging machine is disclosed. The carton feed opening wheel assembly has a pair of spaced and generally parallel endless vacuum conveyor belts moving along a path of travel from a carton magazine assembly to a carton transport conveyor, and a carton opening wheel positioned on the packaging machine with respect to the vacuum conveyor belts for engaging the top portion of an unopened carton blank being moved on the vacuum conveyor belts toward the carton transport conveyor. The carton opening wheel has at least one suction cup supported thereon for engaging the top portion of the carton blank at a speed and direction substantially the same as the speed and direction of the unopened carton blank moving on the vacuum conveyor belts. Thereafter, the speed of the suction cup in the direction of the path of travel is retarded with respect to the speed of the bottom portion of the carton blank being moved on the vacuum conveyor belt as the suction cup is simultaneously moved perpendicularly away from the vacuum conveyor belts so that the carton blank is opened, whereupon the opened carton is then passed to the carton transport conveyor. |
